Added Header and Footer support using Skia

chrome/renderer/print_web_view_helper_linux.cc

Index: chrome/renderer/print_web_view_helper_linux.cc
diff --git a/chrome/renderer/print_web_view_helper_linux.cc b/chrome/renderer/print_web_view_helper_linux.cc
index 8c6dad96e3268ae5d5a56d4fa4c2db015fef6fbc..783677310a32c435da5f3cf5d305599160c833b4 100644
--- a/chrome/renderer/print_web_view_helper_linux.cc
+++ b/chrome/renderer/print_web_view_helper_linux.cc
@@ -8,13 +8,18 @@
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
+#include "base/utf_string_conversions.h"

[vandebo (ex-Chrome), 2011/07/19 21:31:20]

Looks like you've added a bunch of extra includes that aren't needed any more. 
Please only include things that are needed.

[Aayush Kumar, 2011/07/21 21:58:53]

Done.

 #include "chrome/common/print_messages.h"
 #include "content/common/view_messages.h"
 #include "printing/metafile.h"
 #include "printing/metafile_impl.h"
 #include "printing/metafile_skia_wrapper.h"
 #include "skia/ext/vector_canvas.h"
+#include "skia/ext/vector_platform_device_skia.h"
+#include "third_party/skia/include/core/SkColor.h"
+#include "third_party/skia/include/core/SkDraw.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
+#include "third_party/skia/include/core/SkTypeface.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
 #include "ui/gfx/point.h"
 
@@ -34,7 +39,8 @@ void PrintWebViewHelper::RenderPreviewPage(int page_number) {
   PrintPageInternal(page_params,
                     print_preview_context_.GetPrintCanvasSize(),
                     print_preview_context_.frame(),
-                    print_preview_context_.metafile());
+                    print_preview_context_.metafile(),
+                    true);
   print_preview_context_.RenderedPreviewPage(
       base::TimeTicks::Now() - begin_time);
   PreviewPageRendered(page_number);
@@ -148,12 +154,12 @@ bool PrintWebViewHelper::RenderPages(const PrintMsg_PrintPages_Params& params,
   if (params.pages.empty()) {
     for (int i = 0; i < *page_count; ++i) {
       page_params.page_number = i;
-      PrintPageInternal(page_params, canvas_size, frame, metafile);
+      PrintPageInternal(page_params, canvas_size, frame, metafile, false);
     }
   } else {
     for (size_t i = 0; i < params.pages.size(); ++i) {
       page_params.page_number = params.pages[i];
-      PrintPageInternal(page_params, canvas_size, frame, metafile);
+      PrintPageInternal(page_params, canvas_size, frame, metafile, false);
     }
   }
 
@@ -168,30 +174,23 @@ void PrintWebViewHelper::PrintPageInternal(
     const PrintMsg_PrintPage_Params& params,
     const gfx::Size& canvas_size,
     WebFrame* frame,
-    printing::Metafile* metafile) {
-  double content_width_in_points;
-  double content_height_in_points;
-  double margin_top_in_points;
-  double margin_right_in_points;
-  double margin_bottom_in_points;
-  double margin_left_in_points;
-  GetPageSizeAndMarginsInPoints(frame,
-                                params.page_number,
-                                params.params,
-                                &content_width_in_points,
-                                &content_height_in_points,
-                                &margin_top_in_points,
-                                &margin_right_in_points,
-                                &margin_bottom_in_points,
-                                &margin_left_in_points);
+    printing::Metafile* metafile,
+    bool is_preview) {
+  PageSizeMargins page_size_margins_in_points =
+      GetPageSizeAndMarginsInPoints(frame, params.page_number, params.params);
 
   gfx::Size page_size(
-      content_width_in_points + margin_right_in_points +
-          margin_left_in_points,
-      content_height_in_points + margin_top_in_points +
-          margin_bottom_in_points);
-  gfx::Rect content_area(margin_left_in_points, margin_top_in_points,
-                         content_width_in_points, content_height_in_points);
+      page_size_margins_in_points.content_width +
+          page_size_margins_in_points.margin_right +
+          page_size_margins_in_points.margin_left,
+      page_size_margins_in_points.content_height +
+          page_size_margins_in_points.margin_top +
+          page_size_margins_in_points.margin_bottom);
+
+  gfx::Rect content_area(page_size_margins_in_points.margin_left,
+                         page_size_margins_in_points.margin_top,
+                         page_size_margins_in_points.content_width,
+                         page_size_margins_in_points.content_height);
 
   SkDevice* device = metafile->StartPageForVectorCanvas(
       page_size, content_area, 1.0f);
@@ -203,6 +202,15 @@ void PrintWebViewHelper::PrintPageInternal(
   SkRefPtr<skia::VectorCanvas> canvas = new skia::VectorCanvas(device);
   canvas->unref();  // SkRefPtr and new both took a reference.
   printing::MetafileSkiaWrapper::SetMetafileOnCanvas(canvas.get(), metafile);
+
+  if (is_preview && params.params.display_header_footer) {
+    // The page_number count starts from '0', so, we add by '1'.

[dpapad, 2011/07/19 20:34:01]

Nit: Replace this line with 
"The page_number count starts from 0, so we add 1."
Same in print_web_view_helper_win.cc.

[Aayush Kumar, 2011/07/21 21:58:53]

Done.

+    // The scale factor on Linux is '1' which is the last parameter.
+    PrintHeaderAndFooter(device, canvas, params.page_number + 1,
+                         print_preview_context_.total_page_count(), 1,
+                         page_size_margins_in_points, header_footer_info_);
+  }
+
   frame->printPage(params.page_number, canvas.get());
 
   // TODO(myhuang): We should render the header and the footer.